With Mobile World Congress just days away, tech giant Sony is gearing up for an exclusive event this Sunday to showcase its latest handsets.

Having split from its long-term mobile partner Ericsson, Sony is now going it alone with its Xperia range of handsets.

The first, the Xperia S, was unveiled at CES last month to critical acclaim. The specs on the Xperia S are impressive – a dual-core 1.5GHz processor, a decent display resolution, and a bumper 12MP camera to boot.

Due for general release in the UK in March, the Xperia S is pegged at the high end of the price spectrum as Sony go head-to-head with the likes of Nokia and Samsung.

But Sony is not putting all its eggs in one expensive basket, and is set to launch a couple of middle to low end devices at MWC next week.

A couple of leaked images have already started doing the rounds on the web, setting the rumour mill abuzz. So what are these new devices, and will they be worth buying?

Sony Xperia U

This one is sitting at the low end of the price spectrum, but don’t let that fool you – the Xperia U is still a very decent smartphone.

There have been very few concrete details from Sony, but rumours abound that we’ll be seeing Android 4.0 Ice Cream Sandwich on the inside – the same as the Xperia S.

As this is a cheaper model, expect to see a 1GHz dual-core processor, a 480 x 854 display, and a 5MP camera. We’ve had no word on price, but it’ll be way below the £400 price tag of the Xperia S.

Sony Xperia P

This one fits in between the Xperia S and Xperia U, so Sony has all bases covered. Like the Xperia U, it will come with a 1GHz dual-core processor.

But with a 4-inch qHD display, and an 8MP camera, the Xperia P is much closer to the S in terms of look and feel. The Xperia P is rumoured for a price tag of around £300.